Channeling-machine.



PATENTED JUNE 5,- 1906. A. H. GIBSON. GHANNELING' MACHINE.

APPLICATION FILED FEB.'14,1906.

'3 SHEETS-SHEET 1.-

V%/// filllellfal's No. 822,597. 'PATENTBD JUNE 5-, 1906.

A H GIBSON GHANNELING MACHINE. APPLIOIATIVO'I-J FILED 21:13.14. 19 0s.

2 sums-SHEET z.

No. 822,597. PATENTED JUNE 5, 1906.

A.- H. GIBSON.

GHANNELING MACHINE.

APPLICATION FILED FEB.14,1906.

3 SHEETSSHEET 3v S erne earner ARTHUR H. GIBSON, or'nasrouj PENNSYLVANIA, Assronon re arose sort-Barn) COMPANY, or NEW YORK, N. r, A CORPORATIQN or NEW JERSEY.

OHANNELING-EVIACHHNE.

Specification of Letters Patent. Patented June 5, 1906.

Application filed February 14,1906. Serial lie. 301,018.

ro channeling-machines .45 for rendering To (All m/m'nt it may concern;

Be it known that I, ARTHUR H. GIBSON,. a subject of the King of Great Britain, and a resident of Easton, in' the county of Northampton and State of Pennsylvania, have invented a new and useful Improvement in Channeling-Machines, of which the following is a specification.

My invention relates to'improvements in in which the tool-piston is operated by reciprocating columns of air from a pressor. The object of my invention is certain improvements in the construction,

form, and arrangement of the several parts whereby automatic means are provided for cushioning the blow of the tool when itis not striking its work and also for manually controlling the movement of the tool-piston. A further object is to provide the tool-piston with two heads and the cylinder with two separated piston chambers arranged tanv dem, whereby a very large piston area may be obtained without the-necessity of making 25 the whole tool-cylinder too large in diameter for convenient operation and in which the several parts may be very readily assembled.

In the accompanying drawings, Figure 1 represents the channeling-machine in eleva tion mounted on a truck, an electric motor being shown for driving the pressor. Fig. 2 is a side view of the tool-cylinder, a portion of the same being shown insection along the plane which passes through the manually- 3 5 o erated controllingevalves. Fig. 3 is a sectlontaken in the plane of the line A A of Fig.

2 looking in the direction of the arrows. Fig.

. 4 is a rear end view ofthe tool-cylinder. Fig.

5 is a detail section taken in the plane of the 40 line AA of Fig.2, showin the inner manuallyo erated controllin -va ve turned in position to bring the tu es which lead from the airre'ssor into 0 en communication with eac other throng the back piston-chamber the tool inoperative without stopping'the' o erationof the pressor; and

" Fig. 6 isa deta section in the same plane as Fig. 5, showfngthe outer manually-operated controlling-valve turned in position to out 5o-ofli the'front port of the front piston-chamber from thepassage leading from one of the resser-tubes. I g

I have shown my improvedchannelingto provide piston-chamber so as when the piston-head vwith the front port the passage cated exterior to the cylinder.

machine as mounted on a truck 1,- provided with traction-wheels 2, arranged to travel alon the rails 3 of atrack. This truck may be 0 any well-known or approved form and may be driven along the track by any desired motive power.

The air-pressor is denoted by 4 and is hercin shown as being driven from an electric motor 5, mounted on the truck 1. T he shell which supports the tool-cylinder 6 is denoted by 7 and is mounted on the truck 1 in the usual manner, Flexible tubes 8 and 9 lead from the airpressor 1 to the tool-cylinder 6 for the purpose of conveying reciprocating columns of air to the tool-cylinder. T his tool-cylinder 6 is provided with a front head 10, a back head 1 1, and an intermediate head composed of two plates 12 13.

This intermediate head divides the interior of the eylinder into back and front piston-chambers 14 15. The tool-piston is-shown as comprising an outer rod 1.6, provided with ahead 17, arranged to reciprocate in the front pistonchamber 15, and an inner rod 18, passing through the intermediate head 12 13 and pro: vided with a piston-head 19, fitted to reciprocate in the back piston-chamber 14.; This" inner piston-head 19 is removably' secured to the rod 18 by a nut 20, which has a screw threaded engagement with the inner end of the said rod 18. A longitudinal passage 21 in the walls of the tool-c linder/d connects the air-tube 8 with the aek port 22 of. the back pistonchamber 14 and the back port 23 of the front piston-chamber 15. The port 22 is located a short distance from the rear end of the back to form an air-cushion 19 is approaohin the limit of its rearward movement and has closed the said port 22'. A lon itudinal passage 241- is alsolocated in the walls of the tool-cylinder 6, which passage'connects the air-tube 9 25 of the back pistonchamber 14 and the intermediate front 14 is also provided with an auxiliary back, port port 22, which 24 by means-ct a manually-open ated valve 28, the handle 2910i which is 10% port of the front PlStOD OhZLIDbEX 15 may may be opened and closed to port 26 of the frontpistdn-chamber 15. The.

' The front be opened and closed to the longitudinal pas sageQ lf through a manually-operated valve $31, the handle 32 of which is located exterior to thetool-oylinder-.-

The several parts of the tool-cylinder assembled as follows: An annular shoulder 33 is formed in the interior ofv thecylinder by boring; theback portion of the same of I the annular shoulder, 33.

'ing 34 is then inserted into the back portion slightly greater diameter than the front portion. The plateslZ13, which form the in termediate head, are inserted intoposition on of the cylinder with its front end resting-on the plate 12 of the intermediate head. The front member of the back head 11 is then in 'sertedinto position with its front face'resting I against the back end of the cylindrical lining.

In operation when the tool is workingnor mally it is desirable that the column of air which is used for withdrawing the tool should I be admitted to the piston-chambers through the ports 25 and 30, so as to get the full effect. When the truck on which the channeling-machine is mounted runsover a hollow spot in the rock, it wouldbe desirable to provide a cushion for the forward stroke of the tool- I piston. This is accomplished by closing the port 30 to the passage 24 by manipulating the outer or cushion valve 31. The air is then caused to enter the front 'piston-cham-l ber 15 in front of the head 17 through the intermediate port 26. Thisarrangement will prevent the piston-head 17 from striking the front head 10. As soon asv the truck has v passed beyond the hollow spot in the rock in the vertical course of stone-channeling work the valve 3l'n1ay be again manipulated to open the port to the passage 24 and the full withdrawing force of the column of air is effected. The inner valve 28 may be designateda stopvalve and is used for stopping the operation of the tool without stopping the operation of. the pressor. When the valve 28 is turned'to open communication from the port 27 to'the passage 24, it will be seen that open communication isestablished from the air-'pressor tube 9 to the air-pressor tube 8 at the back of the piston-head 19. This will cause the tool to remain at the limit of its outward movement,

What I claim is- 1. A tool-cylinder having piston-chambers therein, a piston having heads in-said chamhers, air-feeding tubes, said cylinder having front and back ports for the two chambers communicating with their respective tubes, and an auxiliary back port for one chamber communicating with-the-tube other than the one with which the other back port communicates and a valve for opening and closing said auxiliary back port.

I 2. A tool-cylinder having piston-chambers I, herein, a piston having heads in said chamhers, air-feeding tubes, said cylinder having A cylindrical lin-' piston-chambers therein, a I

headsfmsaid chambers," a1rceding tubes,

frontportsfor the chambers communicating with one air tube,,back ports for the cham-- bers communicating with the other tube, and

anauxiliary back port for one of said cham -b ers communicating with the first named air- 'tube and avalve for opening and closing the said auxiliary 'backaport. A tool cylinder havingpiston-chambera therein, a pis'ton having heads in said chambers, air-feeding tubes,lsaid cylinder having; front ports for the chambers communicating with one air-tube, back ports for the chamberscommunicating with the other air-tube,

and an auxiliary back port for one of-said chambers communicating with 1 the 'rfirstnamed air-tube and a manually-operated' back portL 4. A tool-cylinder having front and back iston having valve foropening and closing the auxiliary 7 said cylinder having front and'backports'for the twochambers communicating with their respective tubes, and an auxiliary back port for the back piston-chamber communicating with the tube other than the one, which-the cates and a valve for auxiliary back ort. v

5. A tool-cylinder having front andback piston-chambers therein, a piston having opening and closingthe other back port in said chambtar'com'muniheads in said chambers, air-feeding tubes,

said cylinder having front ports for the chambers communicating with one air-tube, back v I'OO ports for the chambers communicatingwith the other air-tube, and an auxiliary back port for the back chamber communicating with the first-named air-tube and a valve for opening and closing the auxiliary back port. 6. A tool-cylinder having piston-chambers therein, a piston having heads in said cham- I bers, air-feeding tubes, said cylinder having front ports for the chambers communicating with one air-tube, an intermediate front port for one chamber communicating with said.

' with one air-tube, an intermediate front port for one chamber communicating with said air-tube, an auxiliary back port for said other chamber communicating with said airtube, and back ports for both chambers communicating with the other air-tube, a manually-operated valve for opening and closing the front port for one chamber and a manuber.

ports for the ally-operated valvefor opening. and closing the :auxili ary back port for the other cham- 8. A tool-cylinder having front and back iston-chambers therein, a 'iston having eads in-said chambers, aireedin tubes, said cylinder having front ports leading from the said chambers. to one air-tube, an intermediate front port for the front chamber communicating with said air-tube, an auxiliary back port for the back piston-chamber communicating with said air-tube, and back front and-back chambers communicating with the other air-tube, a valve for opening and closing the front port for the front piston-chamber and a valve for open ingand closing the auxiliary back port for the back piston-chamber. 9. A tool-cylinder having front and back iston-chambers therein, a

eads in said chambers, air ceding tubes,

- communicating 'ary, 1906;

Eiston having said c linder having front ports leading from the said chambers to one air-tube, an intermediate front port for the front chamber iary back port for the back piston-chamber communicating with said air-tube, and back ports for the front and back chambers com municating with the other air-tube, a manually-operated valve for opening and closing the front port for the front iston-chamber and a manually-operated valve for opening 'th said air-tube, an auXil- 1 and closing the auxiliary back port for the back piston-chamber.

t In testimony that I claim the foregoing as my invention I have signed my name, inpresence oftWo 'tnesses, this.9th day of Febru ARTHUR H. GIBSON.

' Witnesses: 

